Egg-tester



(No Model.)

0. E. KJIESBU & H. STENSON.

EGG TESTER.

No. 430,476. Patented June 1'7, 1890.

Nrrnn Sterns .arnivr rrrcnc OLUF E. KJESBU AND HENRY STENSON, OFSTARBUCK, MlNNESO'lA.

EGF-TESTER.

SPECIFICATION forming part of Letters Patent No. 430,476, dated June 17,1890.

Application filed October 30, 1889. Serial No. 328,683. (No model.)

,To r/,ZZ whom, t may concern:

leit known that we, OLUF E. KJEsnU and HENRY STENSON, citizens of theUnited States, residing at Starbuck, in the county of Pope and State ofMinnesota, have invented certain new and useful Improvements in Egg-Testers; and we do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The invention relates to improvements in egg-testers, such as arefrequently used in stores and by dealers to discover the condition ofeggs; and it consists in the construction and novel combination of partshereinafter described, illustrated in the accompanying drawings, andpointed out in the claims hereto appended.

In the accompanying drawings, in which similar letters of referenceindicate corresponding parts, Figure lis a perspective view of thedevice as a whole. Fig.2 is a vertical section of the device from frontto rear. Fig. 3 is a horizontal cross-section of this device. Fig. 4 isa det-ail of the testing-tube. Fig. 5 is a perspective view of thecovering-plate from the under side and showing a modified form ofconstruction.

It must be observed that the nest or series of cells for the eggs formno part of the invention and is of any ordinary construction, it beingnecessary, however, that the said cells have open bottoms, so that thelight can shine through the eggs, and that the frame containing thecellsis of proper size and shape to lit in place upon the tester.

Referring to the drawings by letter, A designates the casing of thetester, having its bottoni a o en its sides a im erforate and its fronta2 a narrow board or plate, as shown. The edges of the sides a3 of theeasing are inclined downward toward the front for a short distance, andthe top of the case is covered by a board or plate c4.

a5 a5 are supporting-strips secured to the inner surfaces of theinclined part of the sides c3 parallel to the edges of said sides and ata suitable distance below said edges.

B is a concave reIiecting-plate, preferably of sheet metal, ,polished onits inner concave surface, about semeircular in cross-section,

and secured within the casing A, its edges being secured to the sidesand its lowest point near the back of said casing.

lVhen the device is in use, the frame C, containing the nest of cellsthat holds the eggs, (which frame must have a bottom removable or notand perforated below the lower ends of the cells 0,) lits into the spacebetween the sides of the casing, its lower side edges resting upon theinclined supportingstrips a5. The lower end of the reflectingplate isnot covered,but retains the concave shape of the section of said plate.

E is a covering shade-plate convex upwardly, semicircular incross-section, having its ends filled in by the semicircular plates e,and provided centrally on top with the opening c. "lhe inner surface oftheplateE 1s colored a dull black by any suitable substance.

F is a testing-tube, which is designed to be used by placing one end tothe eye of the operator and the lower beveled end on the egg to betested. In use it may be passed through the opening e and have its innerendf, which is suitably beveled, placed upon the top of the eggcontained in any cell c, so that the light passing up through the eggsin other cells will be shaded from the eye of the operator.

It is evident that when the frame C is in place and the coveringshade-plate E placed on top of said frame, upon which it. is snuglyfitted, no light from the lamp or other burner G placed in front ofplate l can pass out of the casing A, and that the light which is givenout from the lamp on the reflectingplate B imxnediatelybehind it will bereflected by the plate B through the eggs in the cells c, so that theoperator can examine the eggs collectively through said opening e of thecovering-plate in the usual Well-known manner, or by means of the tube Fcan examine any egg separately in the manner indicated.

When the tester is not in use, the covering shade-plate is placed withinand the top opening covered by a flat board.

The opening a in the top of the ease will allow any smoke from the lampor burner to escape from the case. 1

Having now described our invention, we clairn l. In an egg-tester, thecombination, with IOO the casing, open at its bottom, having imperforatesides, its edges inclining downward to the front of the casing, whichfrontis covered by a board or plate, and the inclined supporting-stripssecured to the inner surfaces of the said sides of the casing parallelto and su iicicntly below its inclined edges, of the concavereflecting-plate secured within the casing' and havingr open ends, andthe cov- @ring` shade-plate fitted upon the cell-frame resting on thesupportingstrips, having' its ends closed, colored a dull dark on itsinner concave surface, and provided with a central opening in its top,substantially as specified.

2. In an egg-tester, the combination, with t-he casing A, open at thebottom, the inclined and imperforalze side plates, and thesupporting-strips a5, secured to said sides, of the concavereflecting-plate B, secured within the casing, the shade-plate E,l1avingclosed ends and colored dark on its inner concave side and provided withthe central opening e in its top, substantially as specified.

In testimony whereof We affix our Signatures in presence of twoWitnesses.

OLUF E. KJESBU. HENRY STENSON. Witnesses:

O. P. BERG, LARs KOPPANG.

